Onobun sustained a tore quad muscle in practice earlier this week and will need surgery.

Kettani worked out for the Jaguars after today’s practice. He gives the team three fullbacks (Will Ta’ufo’ou and Harvey Unga) for the first time this training camp.

Kettani, who played at Navy, has been with New England, Washington and Kansas City but has not appeared in a regular season game. He was waived by the Chiefs on May 12.

Kettani attended the U.S. Naval Academy and then negotiated a deal with the Department of Defense to allow him to spend seven years in the Naval Reserve while being allowed to play football. With the Mids, he rushed 395 times for 2,091 yards and 15 touchdowns.

In June 2013, while with the Redskins, he was promoted from lieutenant junior grade to lieutenant during a ceremony at the team’s facility.